A method and device for measuring arc thermal energy using a transverse electromagnetic wave chamber

Abstract

The invention relates to a method and a device for utilizing a transverse electromagnetic wave chamber to measure arc heat energy. The specific value of the arc heat energy is acquired by measuring the voltage and current information of gas discharge arc, utilizing a measure result of the arc heat energy, combining with the electromagnetic radiation energy generated by the arc measured by the TEM chamber and then calculating. The method comprises the following steps: (1) measuring the voltage and current information of the gas arc; (2) adopting a mathematical method for integrating the product of voltage and current on a time axis, thereby acquiring the total energy of the arc; (3) utilizing the transverse electromagnetic (TEM) chamber to measure the electromagnetic radiation energy of the arc; (4) reducing the electromagnetic radiation of the arc from the total energy of the arc, thereby acquiring the heat energy of the arc. The method provided by the invention has the advantages of safety, reliability, flexible operation and indirect measurement for the heat energy of the arc.

Description

technical field [0001] The invention relates to a method and device for measuring arc heat energy, in particular to a method for obtaining arc heat energy through indirect measurement in a strong electromagnetic environment, and belongs to the technical field of electromagnetic compatibility testing. Background technique [0002] When the electric field in the air is strong enough, the gas molecules will be ionized to form plasma, and a short discharge current will be generated to consume or neutralize the charges, emit light and heat, and produce sound. The spark discharge generally lasts for a short time, and the required electric field strength is very high. Such a field strength generally exists between the tips of two conductive metal bodies, so it is also called tip discharge. [0003] The strong electromagnetic field environment can cause a certain potential difference between the tips of different metal conductors. When the potential difference is large enough and th...

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Problems solved by technology

[0006] However, the direct test method also has some insurmountable shortcomings: First, the direct test method is relatively unsafe, and the fuel vapor in a confined space is not easy to control after being ignited, and even has the risk of explosion; the direct test method can only carry out qualitative analysis , the test results are only valid for the test conditions, and at the same time, the relevant information of the electromagnetic radiation energy cannot be obtained, so quantitative data cannot be obtained, so the results under other test conditions cannot be evaluated through the test data

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